00:01
Here in this question, we have 10 alpha that is equal to r1 plus r2 divided by x.
00:08
Now here the alpha value is very small.
00:15
So, for that reason what's happening here, so here we can just take it as alpha only, no need to take 10 alpha.
00:22
So, it is alpha will be also equal to r1 plus r2 divided by x.
00:27
Now, ef is equal to root over of x square minus of r1 plus r2 of whole square.
00:38
So, this is we can write simply as x square root over of 1 minus r1 plus r2 divided by x square, this is square.
00:50
So, from here we can say that approximately we can take the ef value that is equal to x minus of r1 plus r2 of a square divided by 2x.
01:06
So, this is what we got over here.
01:08
Now, we will find out the length of the belt which has to be calculated...